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Physics Research International
Volume 2011 (2011), Article ID 705686, 8 pages
http://dx.doi.org/10.1155/2011/705686
Research Article

L X-Rays RYIED Oscillations and Proton-NMRD of Gd2O3 Nanoparticles

1Física e Unidade de Acelerador, Instituto Tecnológico e Nuclear, Estrada Nacional 10, 2686-953 Sacavém, Portugal
2Centro de Física Atómica da Universidade de Lisboa, Avenida Prof. Gama Pinto 2, 1649-003 Lisboa, Portugal
3Centro de Física da Matéria Condensada da Universidade de Lisboa, Avenida Prof. Gama Pinto 2, 1649-003 Lisboa, Portugal

Received 17 September 2010; Revised 4 January 2011; Accepted 8 March 2011

Academic Editor: Sergey B. Mirov

Copyright © 2011 A. Taborda et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. M. A. Reis, P. C. Chaves, and J. C. Soares, “Particle induced X-ray emission—relative yield ion energy dependence, an IBA chemical speciation method,” Nuclear Instruments and Methods in Physics Research B, vol. 229, no. 3-4, pp. 229–413, 2005. View at Publisher · View at Google Scholar · View at Scopus
  2. P. C. Chaves and M. A. Reis, “Comparative study of W-K and L shells relative yield ion energy dependence,” in Proceedings of the 10th International Conference on Particle Induced X-Ray Emission and Its Analytical Applications, M. Budnar and M. Kavčič, Eds., p. 810.1, 2004, Digitally Published.
  3. S. Raj, H. C. Padhi, and M. Polasik, “Influence of chemical effect on the Kβ-to-Kα X-ray intensity ratios of Ti, V, Cr and Fe in TiC, VC, CrB, CrB and FeB,” Nuclear Instruments and Methods in Physics Research B, vol. 145, no. 4, pp. 485–491, 1998. View at Scopus
  4. S. Raj, H. C. Padhi, and M. Polasik, “Influence of alloying effect on Kβ/Kα X-ray intensity ratios of V and Ni in VxNi1−x alloys,” Nuclear Instruments and Methods in Physics Research B, vol. 155, no. 1, pp. 143–152, 1999. View at Publisher · View at Google Scholar
  5. S. Raj, H. C. Padhi, D. K. Basa, M. Polasik, and F. Pawlowski, “Kβ-to-Kα X-ray intensity ratio studies on the changes of valence electronic structures of Ti, V, Cr, and Co in their disilicide compounds,” Nuclear Instruments and Methods in Physics Research B, vol. 152, no. 4, pp. 417–424, 1999. View at Publisher · View at Google Scholar · View at Scopus
  6. S. Raj, H. C. Padhi, and M. Polasik, “Influence of chemical effect on the Kβ-to-Kα X-ray intensity ratios of Cr, Mn and Co in CrSe, MnSe, MnS and CoS,” Nuclear Instruments and Methods in Physics Research B, vol. 160, no. 4, pp. 443–448, 2000. View at Publisher · View at Google Scholar · View at Scopus
  7. H. C. Padhi, C. R. Bhuinya, and B. B. Dhal, “Influence of solid-state effects on the Kβ/Kα intensity ratios of Ti and V in TiB, VB and VN,” Journal of Physics B, vol. 26, no. 23, pp. 4465–4469, 1993. View at Scopus
  8. F. Pawlowski, M. Polasik, S. Raj, H. C. Padhi, and D. K. Basa, “Valence electronic structure of Ti, Cr, Fe and Co in some alloys from Kβ-to-Kα X-ray intensity ratio studies,” Nuclear Instruments and Methods in Physics Research B, vol. 195, no. 3-4, pp. 367–373, 2002. View at Publisher · View at Google Scholar · View at Scopus
  9. K. Jankowski and M. Polasik, “On the calculation of Kβ/Kα X-ray intensity ratios,” Journal of Physics B, vol. 22, no. 15, pp. 2369–2376, 1989. View at Publisher · View at Google Scholar · View at Scopus
  10. K. Kawatsura, K. Ozawa, M. Terasawa, K. Komaki, and F. Fujimoto, “Computer simulationof channeling implantation at high and medium energies,” Nuclear Instruments and Methods in Physics Research B, vol. 75, pp. 28–32, 1993.
  11. D. Demir and Y. Şahin, “The effect of an external magnetic field on the L3 subshell fluorescence yields and level widths for Gd, Dy, Hg and Pb at 59.5 keV,” Nuclear Instruments and Methods in Physics Research B, vol. 254, no. 1, pp. 43–48, 2007. View at Publisher · View at Google Scholar · View at Scopus
  12. F. Bloch and P. A. Ross, “Radiative auger effect,” Physical Review, vol. 47, no. 11, pp. 884–885, 1935. View at Publisher · View at Google Scholar · View at Scopus
  13. M. C. Lépy, J. Plagnard, and J. Morel, “Radiative Auger effect: an explanation for discrepancies between theoretical and experimental Kβ/Kα X-ray emission probability ratios?” Nuclear Instruments and Methods in Physics Research A, vol. 339, no. 1-2, pp. 241–247, 1994. View at Scopus
  14. D. C. Langreth, “Born-oppenheimer principle in reverse: electrons, photons, and plasmons in solids-singularities in their spectra,” Physical Review Letters, vol. 26, no. 20, pp. 1229–1233, 1971. View at Publisher · View at Google Scholar · View at Scopus
  15. R. W. Ditchfield, “Measurement and interpretation of the plasmon energy in alumina,” Solid State Communications, vol. 19, no. 5, pp. 443–444, 1976. View at Scopus
  16. P. C. Chaves, M. A. Reis, N. P. Barradas, and M. Kavčič, “Dependence of relative intensity of L1 sub-shell X-rays on ion beam energy,” Nuclear Instruments and Methods in Physics Research B, vol. 261, no. 1-2, pp. 121–124, 2007. View at Publisher · View at Google Scholar · View at Scopus
  17. P. C. Chaves, M. Reis, and E. Alves, “New high energy and high resolution lisbon PIXE set-up,” in Proceedings of the 11th International Conference on PIXE and Its Analytical Applications, J. Miranda, J. L. Rucalva-Sil, and O. G. de Lucio, Eds., pp. PII-2-1–PII-2-4, 2007.
  18. L. Helm, “Relaxivity in paramagnetic systems: theory and mechanisms,” Progress in Nuclear Magnetic Resonance Spectroscopy, vol. 49, no. 1, pp. 45–64, 2006. View at Publisher · View at Google Scholar · View at Scopus
  19. M. A. Reis, P. C. Chaves, A. Taborda, and A. Carvalho, “Comparison of Gd L-Xrays RYIED and proton NMRD,” in Proceedings of the 11th International Conference on PIXE and Its Analytical Applications, J. Miranda, J. L. Rucalva-Sil, and O. G. de Lucio, Eds., p. PI-6, 2007.
  20. E. Toth, L. Helm, and A. E. Merbach, “Relaxivity of gadolinium(III) complexes: theory and mechanism,” in The Chemistry of Contrast Agents in Medical Magnetic Resonance Imaging, E. Toth and A. E. Merbach, Eds., John Wiley & Sons, New York, NY, USA, 2001.
  21. J. C. Bousquet, S. Saini, D. D. Stark et al., “Gd-DOTA: characterization of a new paramagnetic complex,” Radiology, vol. 166, no. 3, pp. 693–698, 1988. View at Scopus
  22. M. A. Reis, P. C. Chaves, V. Corregidor et al., “Detection angle resolved PIXE and the equivalent depth concept for thin film characterization,” X-Ray Spectrometry, vol. 34, no. 4, pp. 372–375, 2005. View at Publisher · View at Google Scholar · View at Scopus
  23. M. A. Reis, P. C. Chaves, L. C. Alves, and N. P. Barradas, “Dt2, a pixe spectra simulation and fitting package,” X-Ray Spectrometry, vol. 37, no. 2, pp. 100–102, 2008. View at Publisher · View at Google Scholar · View at Scopus
  24. N. P. Barradas and C. Jeynes, “Advanced physics and algorithms in the IBA DataFurnace,” Nuclear Instruments and Methods in Physics Research B, vol. 266, no. 8, pp. 1875–1879, 2008. View at Publisher · View at Google Scholar · View at Scopus
  25. A. Taborda, P. C. Chaves, and M. A. Reis, “Universal polynomial approximation to crosssections of K- and L-shell ionisation induced by H and He ion beams,” X-Ray Spectrometry, vol. 40, no. 3, pp. 127–134, 2011. View at Publisher · View at Google Scholar
  26. J. L. Bridot, A. C. Faure, S. Laurent et al., “Hybrid gadolinium oxide nanoparticles: multimodal contrast agents for in vivo imaging,” Journal of the American Chemical Society, vol. 129, no. 16, pp. 5076–5084, 2007. View at Publisher · View at Google Scholar · View at PubMed
  27. H. Mohan and A. K. Jain, “Energy dependence of proton-induced L X-ray production cross-section for W,” Nuclear Instruments and Methods in Physics Research B, vol. 266, no. 8, pp. 1203–1205, 2008. View at Publisher · View at Google Scholar · View at Scopus
  28. C. Pascual-Izarra, N. P. Barradas, and M. A. Reis, “LibCPIXE: a PIXE simulation open-source library for multilayered samples,” Nuclear Instruments and Methods in Physics Research B, vol. 249, no. 1-2, pp. 820–822, 2006. View at Publisher · View at Google Scholar · View at Scopus
  29. M. A. Reis, L. C. Alvesa, and A. P. Jesus, “Matrix effects correction for quantitative TTPIXE analysis,” Nuclear Instruments and Methods in Physics Research B, vol. 109-110, pp. 134–138, 1996. View at Publisher · View at Google Scholar · View at Scopus
  30. A. Taborda and A. Carvalho, “Superparamagnetic iron oxide nanoparticles—proton nuclear magnetic resonance dispersion curves,” European Physical Journal, vol. 43, no. 2, pp. 145–148, 2008. View at Publisher · View at Google Scholar
  31. N. Bloembergen, E. M. Purcell, and R. V. Pound, “Relaxation effects in nuclear magnetic resonance absorption,” Physical Review, vol. 73, no. 7, pp. 679–712, 1948. View at Publisher · View at Google Scholar
  32. I. Solomon, “Relaxation processes in a system of two spins,” Physical Review, vol. 99, no. 2, pp. 559–565, 1955. View at Publisher · View at Google Scholar
  33. J. Niinistö, N. Petrova, M. Putkonen, L. Niinistö, K. Arstila, and T. Sajavaara, “Gadolinium oxide thin films by atomic layer deposition,” Journal of Crystal Growth, vol. 285, no. 1-2, pp. 191–200, 2005. View at Publisher · View at Google Scholar · View at Scopus
  34. D. H. Powell, O. M. Ni Dhubhghaill, D. Pubanz et al., “Structural and dynamic parameters obtained from 17O NMR, EPR, and NMRD studies of monomeric and dimeric Gd3+ complexes of interest in magnetic resonance imaging: an integrated and theoretically self-consistent approach,” Journal of the American Chemical Society, vol. 118, no. 39, pp. 9333–9346, 1996. View at Publisher · View at Google Scholar · View at Scopus
  35. A. Abragam, Principles of Nuclear Magnetism, Oxford University Press, Oxford, UK, 1994.
  36. A. Taborda, Relaxometria de agentes de contraste usados em imagem por ressonância magnética nuclear, M.S. thesis, Faculdade de Ciências da Universidade de Lisboa, 2006.
  37. M. A. Reis, P. C. Chaves, and A. Taborda, “Agate stone RAE satellites in microcalorimeter based energy fispersive spectrometry high-resolution PIXE,” X-Ray Spectrometry, vol. 40, no. 3, pp. 141–146, 2011. View at Publisher · View at Google Scholar